TIG welding, also known as Tungsten Inert Gas welding or Gas Tungsten Arc Welding (GTAW), is a welding process that uses a non-consumable tungsten electrode to create an arc and melt metal, which is then joined by a filler metal (or sometimes without). An inert gas, typically argon or helium, shields the weld from atmospheric contamination.
Russell Meredith invented TIG welding in 1941 while working at Northrop Aircraft Corporation. He developed the process, also known as Gas Tungsten Arc Welding (GTAW), to meet the needs of welding magnesium in aircraft production.
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